From: Timo Kokkonen <kaapeli@itanic.dy.fi>
Date: Sat, 20 Jun 2009 18:29:02 +0000 (+0300)
Subject: generator: Stop processing work if there is nothing to do
X-Git-Url: http://git.itanic.dy.fi/?p=sudoku;a=commitdiff_plain;h=2db3b4a4c16b4957482ee17aa52aeb50e1e3adab

generator: Stop processing work if there is nothing to do
---

diff --git a/sudoku.cpp b/sudoku.cpp
index 4d5d288..bd838df 100644
--- a/sudoku.cpp
+++ b/sudoku.cpp
@@ -498,14 +498,15 @@ sudoku sudoku::remove_randomly(int min_guesses, int depth)
 {
 	int count = used_numbers();
 	sudoku result;
+	int stop = 0;
 
-#pragma omp parallel for
+#pragma omp parallel for firstprivate(stop)
 	for (int i = 0; i < count; i++) {
 		int x, y;
 		sudoku tmp = *this, tmp2;
 		std::vector<sudoku> results;
 
-		if (done)
+		if (done || stop)
 			continue;
 
 		/* remove a number */
@@ -564,7 +565,7 @@ sudoku sudoku::remove_randomly(int min_guesses, int depth)
 			sudoku empty;
 			//printf("%d, Got multiple results\n", depth);
 			result = empty;
-			#pragma omp flush(done)
+			stop = 1;
 		}
 
 		if (results.empty() && !done) {
@@ -572,8 +573,6 @@ sudoku sudoku::remove_randomly(int min_guesses, int depth)
 				depth);
 			sudoku empty;
 			result = empty;
-			done = 1;
-			#pragma omp flush(done)
 		}
 	}
 	return result;